A few years ago I wanted to take some classes at a community college, and one of their requirements is to take an assessment test to see where you’re at with everything. I told myself there’s no way I wanted to take any remedial math classes, so I used Khan Academy to refresh my skills, and I actually learned some new techniques. It’s great!

I cannot stress enough how great this website is. I was using it to teach myself calculus, there are awesome videos that break everything down and taught me much better than the professor I had.

OMG lol, this is literally in my head because so many reddit users (before the enshittification) were saying it